Billy: So, what's it like, like?
Dad: What's what like?
Billy: London.
Dad: I don't know, son. I never made it past Durham.
Billy: Have you never been?
Dad: Why would I want to go to London?
Billy: It's the capital city.
Dad: Well, there are no mines in London.
Billy: Jesus Christ, is that all you think about?
Billy: Just because I like ballet doesn't mean I'm a poof, you know.
Billy: I don't want a childhood. I want to be a ballet dancer.
Mrs. Wilkinson: Please yourself, darlin'.
Billy: I don't want to do your stupid fucking audition! You only want me to do it for your own benefit.
Billy: All right, all right, don't lose your blob.
Gary Poulson: What are you deeing man? This is hand to hand combat not a bloody tea dance.
Tutor 1: What does it feel like when you're dancing?
Billy: Don't know. Sorta feels good. Sorta stiff and that, but once I get going... then I like, forget everything. And... sorta disappear. Sorta disappear. Like I feel a change in my whole body. And I've got this fire in my body. I'm just there. Flyin' like a bird. Like electricity. Yeah, like electricity.
Mrs. Wilkinson: She must've been a very special woman, your mother.
Billy: No she was just me mam.
Mr. Braithwaite: You look like a right wanker to me, son.
Debbie: If you want, I'll show you me fanny.
Billy: Nah, I'm all right.
Tony: Dance you little twat.
Answer: Some time has passed since Billy left home and became a professional dancer. Jackie is older now and not as physically active as he once was. He has also seldom left his small, provincial town, and being in a major city like London is a little daunting for him, so he is a little uncomfortable and out-of-place.
raywest ★
I'd agree with "overwhelmed" (or in awe), but not to the point of being "daunting" because he was eager and excited to see what Billy had become and was not trying to avoid going there. (It was more like he was trying to not let on how excited he actually was).
KeyZOid
There's nothing to suggest that he was excited or eager, let alone that he was trying to hide it. It's more likely he was simply overwhelmed.